Key in the knob lock



Aug. 6, 1957 Y w. BEST 2,301,535`

y KEY IN THE KNOB LOCK Filed July l1, 1955 2 Sheets-Sheet l Aug. 6, 1957 w. E. BEST KEY In THE KNOB Locx 2 Sheets-Sheet 2 Filed July 11, 1955 FIG. I7 .|32

FIG. I8

NVENTOR iid States Patent() KEY IN THE KNOB LOCK Walter Edwin Best, Indianapolis, Ind. Application July 11, 1955, Serial No. 520,950 1o claims. (ci. 711-146) My invention relates to improvements in key-in-theknob locking sets.

Objects of my invention are to provide a key-in-theknob lock Iof superior utility, security, convenience of operation and installation; incorporating a key removable interchangeable core in combination with novel knob locking and indicating means and dead locking latch mechanisms.

Another object of my invention is to provide a lock wherein the spring means which resists retraction of a bolt by the operation of a key inprimary lock mechanism is weaker than the spring means which resists retraction of said bolt by the turning of knobs, thereby providing a soft key operation in a lock having a snappy and reliable and dependable knob operation.

Another yobject of my invention is to provide a key in the knob lock having a primary lock mechanism in one knob and having in another knob a push button longitudinally movable to selectively lock or unlock a bolt and further having a self-indexing cam of` novel and efficient construction connected with said pust button and holding said push button in different operative positions, the positions of the bush button indicating the locked or unlocked condition of the bolt.

Another object of my invention is to provide a tubular type lock including a bolt receiving tubeV having a cylindrically rounded inner end which will conform to the curvature of a transversely bored hole in a door without requiring the cutting of additional cavities in the Walls of said hole.

l accomplish these and vother objects preferably by means shown in the accompanying drawing in which:

Fig. l is a longitudinal horizontal cross section of my device as taken on line 1-1, Figs. 2 and 3, with parts of the tube mechanism and key controlled knob shown in elevation, and with the cross section of the keyV controlled knob taken on two levels for clarication and to avoid foreshortening; also showing the spindle assembly in the locked .position above the horizontal center line and in the unlocked position below the center line.

Fig. 2 is a longitudinal vertical cross section taken on line 2--2, Figs. l, 3, 16, 17, and 19.

Fig. 3 is a transverse vertical cross section takenon line 3 3, Figs. 1 and 2, showing parts of the tube mechanism in elevation.

Fig. 4 is a perspective view of the key controlled core to be used in the key controlledl knob.

Fig. 5 is a segmental isometric view of the knob spindle at the point where it engages the `tubular dead locking latch mechanism.

Fig. 6, 7, 8, 9, 10, 1l, l2, 13, 14 and 15 are isometric views of the tubular deadlocking parts; said parts being arranged in an isometric pattern in relation to each other; also aligned in isometric relation with the spindle shown in Fig. 5.

Fig. 16 is a transverse vertical cross section through the key controlled knob taken on line 16-16, Fig. 2, specically showing the spindle drive link 60.

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Fig. l7 is a transverse vertical cross section through the knob neck taken on line 17-17, Fig. 2, showing the key control' knob retaining means.

Fig. 18 is an enlarged, partially diagrammatic development of the spindle indexing and position indicating cam in the push button knob.

Fig. 19 is a transverse ver-tical cross section through the knob neck taken on line 19-19, Fig. 2, showing the knob retaining means.

Fig. 20` is an isometric view of the throw member retainer plate 47.

Fig. 21 is an isometric View of the spindle locking plate 69-81.

Frame 30, Figs. l, 2 and 3, supports push button knob 31, key controlled knob 32 and tube 33. Knob neck 34 is keyed longitudinally to frame 30 by half moons 35, Figs. 2 and 17, which rest partly in internal annular groove 36 of frame 30 and external annular groove 37 of knob neck 34. Upon removal of sleeve 38 and with escutcheon 88 and nut 89 out of the way, the half moons 35 can be pushed radially inwardly by a pin or other tool through the access holes 39 in the frame 30. When these half moons 35 are completely out of the annular groove 36 in the frame 30, the knob neck 34 can be removed longitudinally from the frame 30. Projections 40, on half moons 35, project inwardly through holes 41 in knob neck 34 and rest on sleeve 38I which prevents the half moons 35 from moving inwardly iout of the annular groove 36 in the frame 30. Sleeve 127 fits over preferably hardened sleeve 68 to improve the appearance of the knob neck. j

Knob shell 71 is crimped into annular groove 42 in nut 43 and staked against independent rotation at 92 into longitudinal groove 44. Nut 431 is secured to knob neck 34 by threads 72. Slot 112 milled across the end of knob neck 34 forms the seat for the two extensions 113 of the retainer plate 47, Fig. 20, so as to hold the retainer' point of set screw 45 and adequately key these parts to.-`

gether rotatively. Core receptacle 49 in knob shell 71 forms the support for the core 50, shown perspectively in Fig. 4. Key retractable locking lug 51, on the core 50, locks behind the lower edge 52 of the core receptacle 49` and retains the core 50 in the knob shell 71. Throw pins 53 are actuated rotatively by mating holes, not shown, on the rear of the core plug 54 which, in turn, is rotatively actuated by the key 55. These throw pins 53 are preferably riveted at 70 into throw member 56 on which driver pin 57 is preferably an integral part. Throw member 56 is held in position by the round seat 58 in the retainer plate 47, Fig. 20, and the step 59 in the knob neck 34.

Upon rotation of the throw member 56, the driver pin 57 pulls drive link 60, Fig. 16, to one side, either right or left, taking up the lazy motion afforded by the elongated hole 62 in the upper end of the drive link 60. This, in

turn, will, upon further movement of the drive link, rotate the spindle driver 61 which is guided in longitudinal alignment by bearing sleeve 38.

Shear sleeve 63, Fig. 2, is rotatively secured to knob,

neck 34 by shear pin 64. This shear sleeve 63 has a spindle-mating hole 65, of the outline of the cross secand the slide driver 76; said slide driver being riveted tov the innerspindle 75. by rivet 77. The long outer spindle 78 is held longitudinally to the inner spindle 75 by cross v2,301,536v Patented Aug. 6, 1957' pin 79, Fig. 1, in the long outer spindle 78, which rides in annular groove 80 in inner spindle 75 to allow rotation therebetween. These parts 75, 76, 77, '78, 79 and 80 constitute the spindle assembly, which is keyed rotatively to the tube 33 and knob assemblies 31 and 32 by spindle shaped holes in the shear sleeve 63, locking plate 69; throw cams 82, 83 and 84, locking plate 81 and push button knob neck 85.

. The similar locking plates 69 and 81, shown isometrically in Fig. 21, are staked into frame 30 and held from rotation by locking vplate extensions 93 which t into preferably broached-rectangular recesses 94 adjacent to hole 95. This hole 95 is the large cross hole in frame 30, Fig. 2, which forms the guide for tail piece 96 of the tube assembly 33.

When the spindle assembly, parts 67, 75, 76, 78 and 79, has been indexed longitudinally, by the operation of the push button 117, into the position as shown in Figs. 2 and 18; also, in Fig. l, as shown above the center line 2-2, then the short outer spindle 67 is keyed rotatively to both the immovable locking plate 69 and the shear sheeve 63, thus locking knob 32 from rotation.

Now, should the key controlled knob 32 be forced to rotate while in this locked position as by the application thereto of a pipe wrench, producing a torque beyond the normal operation, then the first part of the structure to fail would be the shear pin 64. This would disengage the shear sleeve 63 from the knob neck 34 and allow the free rotation of the knob 32. The feature of this knobwhich-makes the free rotation of the knob possible after the shear pin 64 has been broken, is the normal locked position of the driver pin 57 which is on dead center with the knob 32 so that the rest of the mechanism of the knob can rotate around this point without rotating the inner spindle.

After the shear pin has been broken, the lock can still be operated by the key if the knob is rotated to and held in position so that the core 50 is in the normal position with its maximum dimension vertical.

Hardened sleeve 68 is a loose tit over frame 30 and knob neck34, its purpose being to rotate and also by its hardness, to resist sawing when unlawful entry through the use of a saw is attempted.

Escutcheon 88 is held in position on the door by the nut 89 which is tightened onto threads 91 on frame 30 by the use of a Spanner wrench fitting into Spanner hole 90.

Push button knob 31 is held longitudinally into frame 30 by retainer plate 100, Figs. 2 and 19, which is held outward radially by wire spring 101 lying in part in the plane of the section of Fig. 2 and extending through hole 102 in plane 100. This retainer plate rides in internal annular groove 103 in frame 30 and external annular groove 104 in knob neck 85. A portion of spring 101 extends around the knob neck 85 in annular groove 105 and is held therein by sleeve 106.

To remove knob 31 from the frame 30 it is necessary to unscrew nut 109 and slide back escutcheon 108 so as to expose hole 110 in frame 30, where a screw driver or other tool may be inserted to depress spring 101 and the retainer plate 100 carried thereon. When the retainer plate 100 has been moved inwardly out of the annular groove 103 the knob with the spindle assembly attached, can then be removed longitudinally from the frame 30.

The spindle assembly, comprising parts 67, 75, 76, 78 and 79, is always under a constant spring load by spring 111 to move the assembly in a direction away from knob 32 and toward push button knob 31. The thrust is carried by a straddle C Washer 115 in annular groove 116 in spindle 78 which, in turn, presses against the push button 117. Escapement cam118 is trapped to push button 117 by shoulder 119 and straddle C washer 120, which rides in annular groove 121 in push button 117. The cam 118 is held in location in assembly by pin 122 trapped between sleeve 106 and the bottom of the camway 123. A development of this escapernent cam 118 is shown in Fig. 18 to clarify the action. Spring 111 and push button 117 are shown symbolically in Fig. 18, where pin 122 is a stationary part during the operation of the push button.

Manual pressure on push button 117, Fig. 18, moves cam 118 in the direction of arrow 125 until the stationary pin 122 contacts surface 124 of the recessed camway 123, at which time the cam 118 begins to move also in the direction of arrow 126, until the pocket 128 rits around pin 122. This is the farthest position that the push button 117 can be manually pushed into the knob 31. Upon releasing manual pressure on the push button 117 the said cam is free to move under the impulse of spring 111, away from the pin 122 until said pin 122 strikes surface 130 of the camway 123. This again advances the cam around in the direction of arrow 126 until the pocket'136 tits around pin 122. One complete cycle of cam operation is from line 129 to line 131. One or more. cycles can be provided around this cam as in this instance in which 3 cycles are thus provided.

When the cam 118 is so indexed that the pin 122 is on line 132, Fig. 18, then the spindle assembly is in the unlocked position as shown below the center line 2-2, Fig. '1. When the cam 118 is indexed so that the pin 122 is on line 133, then the spindle assembly is in the locked position as shown in Fig. 2 and also above the center line 22,.Fig. 1.

When the push button 117 is fully depressed toward knob 32, the pin 122 stops any further longitudinal movement of the cam 118 which is thenl in the position indicated by line 134, Fig. 18 and with the pocket 128 pressing against pin 122.

The pushbutton knob neck extension 140 supports and guides the knob shell cup 141 on shouldered step 142.

.Knob shell 143 is crimped into annular groove 144 in nut 145 and is staked longitudinally into longitudinal groove 146, Fig. l. Nut 145 is held longitudinally to knob neck 85 by threads 147 and is also held rotatively by set screw 148, Fig. 2, which screw, in turn, is held from retraction by sleeve 106.

Knobv neck sleeve 86 is trapped between knob shell 143 and frame 30. i

Nut 109 and escutcheon 108 are similar to nut 89 and escutcheon 88 respectively and are secured to frame 30 in a similar manner.

In the tube 33 the tail piece 96 is held in alignment in hole of frame 30 by alignment pin 149, said pin being inserted into hole 152 in frame 30 and on into hole 153 of tail piece 96, while the knob 31 and attached spindle assembly are removed.

Tube shell 154 with extended flange 155 is fastened to face plate 156 by hollow rivets 157. Flange 155 integral with tube 154 is shown rectangular, Fig. 13, to match rectangular face plate 156. This ange can also be provided with rounded ends as shown in Fig. 2, to match 'a face plate of the same shape. Set screws or drive pins 158, Fig. 8, fit through holes 159, Fig. 13, of tube shell 154 and into holes 160 of theY tail piece 96 and come to rest with head 161 of pin 158 fitting tightly into hole 159 of tube shell 154, preferably the inner end of tail piece 96 is of cylindrical shape, as shown in Figs. 3 and 8, so it will `conform to the curvature of a transverse bored hole in a door without addi- Y. outer tongue 163 riding under the ears 188 of the outer throw cams 82 and 84. Flange 185 of said outer tongue 163 forms a seat for auxiliary bolt spring 166. Slot 167.

inthis anger185, guides the auxiliary bolt shaft 169,`

156,`being` trapped between ears 139 and arcuate surface 97 of said faceplate and ilat surface 171 of said bolt 170. The inner tongue 168, Fig. l0, is assembled within the outer tongue 163` with the ears 196 of the inner throw cam 83, Fig. 7, ridingin the lower saddle 195 of inner tongue 168. Locking bar 173, Fig. l1, is guided between legs 1 93 of inner `tongue 168 and is hinged on cross pin 175, which is inserted into hole 176 `of the tail piece 96, Fig. 8. Cam lifter 177, Fig. l5, is guided by shoulders 178 thereof restingonlegs 179 of the outer tongue 163. U-shaped recess 9 9 of cam lifter` 177 is` pressed into annular .groove 180tonrauxiliary bolt shaft 169 and thus travels` with the auxiliary bolt 184.

`Slotted head 201 of straddle pin 197, Fig. l2, straddles bell crank end-191, ts into the pocket 202 of the bell crank end 191 of the locking bar 173, Fig. 1l, and seats on curved surface` 203of said bell crank end 191.

o llonner tongue spring 189, Fig. 1, encircles and is guided by :straddle pin 197 which presses on the bell crank end 191, lof the locking bar 173, holding the said locking bar 173 under compression lagainst the cam lifter 177. Cylindrical end 135 of said straddle pin 197 is guided in hole 150`in face 220 of inner tongue 168. The other end ofthe inner tongue spring 189 holds the inner tongue 168 extended `outwardly inthe tube and pressed against the `inner surface 194 `of the outer tongue 163.

Stratdle pin 197 guided bly hole `198,`Fig. l, in bolt 170, ,also guides the relatively weak bolt springz199 seated in` hole 200., Bolt -spring -199 isso `designed as to completely compress to its required distanceunder action of the bolt 170 before the inner tongue spring 189 begins to move back in the tube. When the bolt 170is retracted into the tube 33 as by the 4closing of the door,the auxiliary bolt 184 is retracted thereby, due tothe lower edge 206 of the said bolt 170 reengaging theoverhanging portion 207 of said auxiliary bolt 184 and is thus carried along-by it. t As the bolt 170 is retracted Minto the tube 33, the cam-lifter 177 begins to slide. along the high portion 192 of the cam surface 208 ofthe locking Abar 173 and as the bolt tail 137 passes under the deadlocking ledge 187 of the locking bar 173, the cam lifter 177 begins to descend the cam surface 208 and lower the locking bar 173. Howeverby this time, the contacting edge 98 ofthe bolt 170 has passed by the deadlocking ledge 187 `and the bolt 170 is .free to continue inwardly without deadlocking.

When` the .door has been closed, the bolt 170 enters a strikecavity providedfor it in the door jamb (not shown) and returns to its extended position under pressure of bolt spring 199, but the. auxiliary bolt 184 is restrained by the said strike fromso moving out to its extended position as there isjno such cavity for` it in the said plate, and the bolt 170.is thereby deadlocked due to the moving down of the deadlocking ledge 187 of the locking bar 173 into engaging position with the bolt 170 when the cam lifter 177 has been moved to the rear of the tube and off the `high point 192 of the locking bar.

' With the push button and spindle assembly in position as shown in. Fig. 2 and also above the center line 2 2, in Fig.`.l, the knobs 31 and 32 are locked from rotation by thelong outer `spindle 78` and short. outer spindle 67 being keyed rotatively to locking plates69 and 81 respectively. However, with `the knobs 31 and 32thus locked rotatively, the inner spindle 75 is free to operate by the rotation of key 55 `through its heretofore described linkt age., With the rotation of thespindle shaped enlargement 74 of inner spindle 75, the central throw cam 83, keyed rotatively thereto, will rotate and retract inner tongue 168 by the action of throw cam ears 196 pullingon saddle 195 of inner tongue 168. With the retraction of said inner tongue` 168, bolt is also retracted with it into the tube 33 by flanges 212 riding under surface 213 of inner tongue 168; said bolt 170 also retracting auxiliary bolt 184 by engagement of lower edge 206 of said bolt 170 with the overlapping portion 207 of said auxiliary bolt 184. This retraction can be accomplished without deadlocking the ybolt since the cam surface 214 on inner tongue 168 is enabled to slide under tab 215 on the locking bar 173 `thus lifting the latter so as to prevent bolt flange 212 from engaging locking bar ledge 187 of locking bar 173 `during the bolt retraction.

With the push button 117 and spindle assembly posi. tioned `as in Fig. l below center line 2--2, the. lockingl plates 69 and 81 `are `in direct alignment with annular grooves 216 and 217 of long outer spindle 78 and short outer spindle 67 respectively.

With the spindle thus indexed, both knobs 31 and 32 are free to rotate. By rotating knobv 31 the rotation is carried through long outer spindle 78 keyed rotatively to spindle shaped hole 73 in knob. neck 85 also similarly keyed to throw cam84; said throw cam ears 188 riding on feet 181 of outer tongue 163.` Upon rotation of knob 31 therefore, theoutertongue 163is retracted into the. tube, compressing main spring 162, and retracting inner tongue 168, bolt- 170 `and auxiliary bolt assembly, with the inner tongue cam surface 214 and locking bar tab 215 performing the same function as the `key operation previously described... t t t Key controlled knob `32 is similarly rotatively keyed through the outer spindle 67 to throw cam 82 which likewise operates on feet 181 of the outer tongue. Brielly, with the bolt 170 and auxiliary bolt extended, the cam lifter177 riding on high point 192 holds the locking bar 173 out of the deadlocking position with the bolt tail flanges `212. With the auxiliary bolt held. in the retracted position the cam lifter 177 has moved away from high point 192 allowing the locking bar to drop down until tab 215 is resting on inner` tongue cam surface 214 with the deadlocking ledge 187` preventing the bolt170 from being forced `back more than the timing distance, which is that distance between the end of bolt `170 and face 220 of tabs 221 on inner tongue 168.

With the auxiliary bolt retracted and bolt 170 extended, i

the locking bar 173 is in the down position. With the operation of the key, the inner tongue is retracted and cam surface 214 is retracted under tab 215 of locking bar 173 which, in turn, raises the deadlocking ledge of locking bar 173 out of locking position before the completion of the timing distanceretraction of bolt 170. `Locking bar 173 is held in alignment by the point 222 being guided in holes 223 and 224 of inner tongue 168 and outer tongue 1 163 respectively. Another alignment is made possible by the extension of bell crank end 191 ofilockingbar 17.3 extending between legs 193 ofinner tongue 16S. The reason for the timing distance is to allow the bolt anges 212 to move4 under and past the deadlocking ledge 187 before the cam lifter 177 is moved ott high point 192.

Ridge 203 on tailpiece 96 acts as a stop to prevent the inner tongue 168 from retracting too far and allowing o the ears 196of the middle throw cam from turning too far and moving olf the saddle 195.

In the operation of this lock, when the `push button 117 is in its outermostposition the annular grooves 216 and 217 in the respective outer spindle members 78 and 67 will register with the locking plates 81 and 69 respec` button 117 is pressed inwardly as far as it will go and moves the entire spindle assembly longitudinally against the pressure of the spring 111. This dis-aligns the annular grooves 216 and 217 relative to the respective locking plates 81 and 89 thus locking spindle members 78 and 67 against rotation. The inward movement of the push button 117 and cam 118 followed by partial outward movement of these parts to the Fig. 2 position causes the cam 11S to be indexed around so that it comes to rest against the pin 122 in the position shown in Fig. 18. In this position the outer spindle parts 78 and 67 are securely locked against rotation and both knobs 31 and 32 are locked against turning. If the locking plate 81 is omitted from the lock then, under the conditions just described only the outer knob will be locked by inward movement of the push button 117. The bolt 170 can always be retracted from the outside by using a proper key and turning the inner spindle member 75. This retracts the inner tongue 193 against the pressure of the weaker spring 189 without compressing the stronger bolt spring 162 and thus soft and easy key retraction of the bolt 170 is provided.

Obviously changes in this lock may be made within the scope and spirit of the following claims.

Having described my invention what I claim as new and desire to protect by Letters Patent is:

I claim:

l. A lock for use in a door which is mounted in a frame having a bolt receiving recess, comprising, a bolt housing; a knob actuated bolt-retracting first tongue movable longitudinally within said housing; knob means connected with said first tongue; a key actuated second boltretracting tongue interconnected with said first tongue for retractile movement both by said first tongue and independently of said first tongue; key operated tongue-retracting lock means connected with said second tongue; a bolt guided in said housing; connecting means connecting said bolt with both of said tongues, said connecting means providing retraction of said bolt and said second tongue by knob actuated retraction of said first tongue and providing retraction of said bolt independently of said first tongue by key actuated retraction of said second tongue; spring means resisting retraction of said knob actuated first tongue; other spring means weaker than said first named spring means resisting retraction of said key-actuated second tongue; an auxiliary bolt movable relative to said first named bolt and positioned alongside of said first named bolt and held retracted by the frame when the first named bolt is seated within the bolt receiving recess in the frame; and a deadlocking lever in said housing blocking retraction of said first named bolt by direct exertion of pressure thereon when said auxiliary bolt is held in a retracted position.

2. The apparatus as claimed in claim l in which the second tongue is provided with devices positioned to engage with the deadlocking lever and move said lever clear of the first named bolt irrespective of the position of the auxiliary bolt when the first named bolt is retracted by retractile movement of either of the tongues.

3. The apparatus as claimed in claim l in which the deadlocking lever is L-shaped and the spring which resists retraction of the second tongue yieldingly urges the deadlocking lever into bolt blocking position and in which the second tongue is provided with devices positioned to cngage with the deadlocking lever and move said lever out of bolt blocking position when the first named bolt is retracted by retractile movement of either of the tongues.

4. In a lock for use in a door which is mounted in a frame having a bolt receiving recess; a bolt housing; a knob actuated bolt-retracting first tongue movable longitudinally within said housing; knob means connected with said first tongue; a keyactuated bolt-retracting second tongue interconnected with said first tongue for retractile movement of said first tongue and independently of said first tongue; key operated tongue retracting means connected with said second tongue; a first spring means resisting retraction of said knob actuated first tongue; a second spring means weaker than said first spring means resisting retraction of said key actuated second tongue; a bolt guided by said housing; a third spring means urging said bolt outwardly; connecting means connecting said bolt with both of said tongues and having an amount of lost motion substantially equal to the throw of the bolt relative to said first tongue and a less amount of lost motion relative to said second tongue providing timing distance movement of said second tongue and said connecting means providing retraction of said bolt and said second tongue by knob actuated retraction of said first tongue and providing retraction of said bolt independently of said` first tongue by key operated retraction of said second tongue; an auxiliary bolt movable relative to said first named bolt and positioned alongside of said first named bolt and held retracted by the frame when the first named bolt is seated in the recess in the frame; a spring pressed deadlocking lever in said housing yieldingly urged into a position blocking retraction of said first named bolt when said auxiliary bolt is held in a retracted position; means carried by said auxiliary bolt holding said deadlocking lever out of bolt blocking position when said auxiliary bolt is in outwardly projected position; and means carried by said second tongue engaging said deadlocking lever and moving the same clear of the bolt during the timing distance retractile movement of said second tongue by said key operated means and by said knob operated means.

5. In a lock, a knob; a push button longitudinally movable in said knob; a cylindrical cam attached to the push button and movable therewith and having a continuous circumferential groove provided with inclined surfaces and pockets; and a cam indexing pin fixed relative to the knob and extending into said groove.

6. In a lock, a lock spindle housing; a lock spindle movable longitudinally in said housing into and out of a locked position; a spring resiliently urging said lock spindle in one direction; a knob connected with said lock spindle; a push button movable longitudinally in said knob and positioned to longitudinally move said lock spindle against the pressure of said spring; a cam rotatively carried by said push button and provided with circum-y ferentially extending inclined surfaces; and a'cam positioning member rigid with said knob and positioned for engagement by said cam, said cam positioning member holding said push button and spindle and cam in different longitudinal positions and indexing said cam rotatively on said push button in response to longitudinal movement of said push button and cam.

7. In a lock, a lock spindle housing; a lock spindle` movable longitudinally in said housing into and out ofv a locked position; a spring resiliently urging said lock spindle in one direction; a knob connected with said lock spindle; a push button movable longitudinally in said knob and positioned to longitudinally move said lock spindle against the pressure of said spring; a cam carried by said push button; a cam track extending entirely around said cam, said cam track having inclined surfaces and stop pockets; and a positioning member rigid relative to said knob holding said cam and push button in different longitudinal positions when it is engaged within the stopk pockets of said cam track and indexing said cam rotatively when the inclined surfaces of said cam track are pressed against it by longitudinal movement of said cam.

8. In a key in the knob lock, a lock spindle housing; a lock spindle movable longitudinally in said housing between a locked and an unlocked position; a spring resiliently urging said spindle into an unlocked position; a knob connected with said lock spindle; a longitudinally movable push button in said knob having its inner end portion abutting said lock spindle, said push button rnov-V ing said lock spindle inwardly against the pressure of said spring into a locked position when said push button is ,moved inwardly in said knob; a cam carried by said push button; a cam track extending entirely around said cam, said cam track having inclined surfaces and having two sets of stop recesses; and a positioning member rigid with said knob and engaging said cam track, said positioning member holding said cam and push button and lock spindle in a locked position when it is in a recess of one of said sets and stopping said cam and push button and lock spindle in an unlocked position when it is in a recess of the other set and said positioning member indexing said cam rotatively when the inclined surfaces of said cam track are pressed against it by the longitudinal move ment of said cam.

9. In a key in the knob lock, a tube; a bolt in said tube; two relatively telescopic tongues in said tube each connected with said bolt; a multiple part lock spindle comprising outer spindle parts and an inner spindle part; tongue retracting means connecting one tongue with said outer spindle parts; other tongue retracting means connecting the other tongue with said inner spindle part; two knobs connected with said outer spindle parts; push button means in one knob operable to lock said outer spindle parts against rotation; and a key operated lock in the other knob operable to retract the tongue which is connected with the inner spindle parts when the `outer spindle parts are locked.

10. In a key in the knob lock, a tube; a bolt slidable in said tube; two tongues in the tube connected with the bolt for retracting the bolt; a multiple part lock spindle comprising two outer spindle parts of tubular shape and an inner spindle part rotatable in said outer parts; tongue retracting means connecting one tongue with said outer tubular spindle parts; other tongue retracting means connecting the other tongue with said inner parts; two knobs connected with said outer tubular spindle parts; whereby said outer spindle parts may be rotatively moved when they are free to turn; push button means in one knob operable to lock said outer spindle parts against rotation by said knobs; and a key operated lock core in the other knob connected with said inner spindle part and operable to retract the tongue which is connected with the inner spindle part when the outer tubular .spindle parts are locked.

References Cited in the le of this patent UNITED STATES PATENTS 51,954 Manley Ian. 9, 1866 560,389 Brigden May 19, 1896 1,114,186 Ross Oct. 20, 1914 1,734,149 Rymer Nov. 5, 1929 2,179,958 Schlage Nov. 14, 1939 2,207,143 Brauning July 9, 1940 2,389,819 Schlage Nov. 27, 1945 2,640,345 Wardwell June 2, 1953 

